小弟用VB.net開發多個攝像頭抓圖的軟件，在網上找了代碼，但是是C語言，小弟才疏學淺，目前還無法轉化成VB.net的.
哪位大俠能幫幫我，非常感謝！！！
- C/C++ code
#include <stdio.h>#include <dshow.h>// change here#define FILENAME L"C:\\DXSDK\\Samples\\Media\\butterfly.mpg"// note that this sample fails on some environmentintmain(){ IGraphBuilder *pGraphBuilder; IMediaControl *pMediaControl; IBasicVideo *pBasicVideo; CoInitialize(NULL); CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC, IID_IGraphBuilder, (LPVOID *)&pGraphBuilder); pGraphBuilder->QueryInterface(IID_IMediaControl, (LPVOID *)&pMediaControl); pMediaControl->RenderFile(FILENAME); pGraphBuilder->QueryInterface(IID_IBasicVideo, (LPVOID *)&pBasicVideo); pMediaControl->Run(); // The image will be saved when OK is clicked MessageBox(NULL, "Grab Image", "Grab", MB_OK); // Must Pause before using GetCurrentImage pMediaControl->Pause(); // get width and height long height, width; pBasicVideo->get_VideoHeight(&height); pBasicVideo->get_VideoWidth(&width); long bufSize; long *imgData; HRESULT hr; /* The second value is NULL to resolve required buffer size. The required buffer size will be returned in variable "bufSize". */ hr = pBasicVideo->GetCurrentImage(&bufSize, NULL); if (FAILED(hr)) { printf("GetCurrentImage failed\n"); return 1; } if (bufSize < 1) { printf("failed to get data size\n"); return 1; } imgData = (long *)malloc(bufSize); // The data will be in DIB format pBasicVideo->GetCurrentImage(&bufSize, imgData); // save DIB file as Bitmap. // This sample saves image as bitmap to help // understanding the sample. HANDLE fh; BITMAPFILEHEADER bmphdr; BITMAPINFOHEADER bmpinfo; DWORD nWritten; memset(&bmphdr, 0, sizeof(bmphdr)); memset(&bmpinfo, 0, sizeof(bmpinfo)); bmphdr.bfType = ('M' << 8) | 'B'; bmphdr.bfSize = sizeof(bmphdr) + sizeof(bmpinfo) + bufSize; bmphdr.bfOffBits = sizeof(bmphdr) + sizeof(bmpinfo); bmpinfo.biSize = sizeof(bmpinfo); bmpinfo.biWidth = width; bmpinfo.biHeight = height; bmpinfo.biPlanes = 1; bmpinfo.biBitCount = 32; fh = CreateFile("result.bmp", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); WriteFile(fh, &bmphdr, sizeof(bmphdr), &nWritten, NULL); WriteFile(fh, &bmpinfo, sizeof(bmpinfo), &nWritten, NULL); WriteFile(fh, imgData, bufSize, &nWritten, NULL); CloseHandle(fh); free(imgData); // Release resource pBasicVideo->Release(); pMediaControl->Release(); pGraphBuilder->Release(); CoUninitialize(); return 0;}主要是這段代碼轉換,把DIB保存為BMP文件
- C/C++ code
// get width and height long height, width; pBasicVideo->get_VideoHeight(&height); pBasicVideo->get_VideoWidth(&width); long bufSize; long *imgData; HRESULT hr; /* The second value is NULL to resolve required buffer size. The required buffer size will be returned in variable "bufSize". */ hr = pBasicVideo->GetCurrentImage(&bufSize, NULL); if (FAILED(hr)) { printf("GetCurrentImage failed\n"); return 1; } if (bufSize < 1) { printf("failed to get data size\n"); return 1; }[color=#FF0000] imgData = (long *)malloc(bufSize); '這裡開始傻眼了，不知道怎麼轉換了[/color] // The data will be in DIB format pBasicVideo->GetCurrentImage(&bufSize, imgData); // save DIB file as Bitmap. // This sample saves image as bitmap to help // understanding the sample. HANDLE fh; BITMAPFILEHEADER bmphdr; BITMAPINFOHEADER bmpinfo; DWORD nWritten; memset(&bmphdr, 0, sizeof(bmphdr)); memset(&bmpinfo, 0, sizeof(bmpinfo)); bmphdr.bfType = ('M' << 8) | 'B'; bmphdr.bfSize = sizeof(bmphdr) + sizeof(bmpinfo) + bufSize; bmphdr.bfOffBits = sizeof(bmphdr) + sizeof(bmpinfo); bmpinfo.biSize = sizeof(bmpinfo); bmpinfo.biWidth = width; bmpinfo.biHeight = height; bmpinfo.biPlanes = 1; bmpinfo.biBitCount = 32; fh = CreateFile("result.bmp", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); WriteFile(fh, &bmphdr, sizeof(bmphdr), &nWritten, NULL); WriteFile(fh, &bmpinfo, sizeof(bmpinfo), &nWritten, NULL); WriteFile(fh, imgData, bufSize, &nWritten, NULL); CloseHandle(fh); free(imgData);